Antenna



FIG. 1 is a perspective view from the above of an antenna showing our new design. (The parts shown with broken lines are not considered to be a part of the claimed design.);

FIG. 2 is a perspective view from below thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a perspective view from the above of the second embodiment of an antenna showing our new design. (The parts shown with broken lines are not considered to be a part of the claimed design.);

FIG. 10 is a perspective view from below thereof;

FIG. 11 is a top plan view thereof;

FIG. 12 is a bottom plan view thereof.

FIG. 13 is a front elevational view thereof;

FIG. 14 is a left side elevational view thereof;

FIG. 15 is a right side elevational view thereof; and,

FIG. 16 is a rear elevational view thereof. 

The ornamental design for an antenna, as shown and described. 